ISR Performance Circuit Spec Cat Back Exhaust Mazda Miata NB 1999-2005 | IS-CSEXH-NB Vehicle Model_STi Induction and engine sounds more

Induction and engine sounds more audible

Torque capacity: 420ft/lbs

• Bar and Plate Core

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CP forged pistons feature superb ring seal

ISR Performance Circuit Spec Cat Back Exhaust Mazda Miata NB 1999-2005 | IS-CSEXH-NB Vehicle Model_STi Induction and engine sounds morePart #: IS CSEXH NB A front and mid pipe that mounts directly to the header and features an integrated muffler. This section of pipe is 2. 5'' brushed stainless steel construction. The rear section will feature a polished stainless steel muffler with 4'' tip. The NB Miata exhausts also come with a secondary o2 bung and o2 bung extension for individuals using factory ECU who do not want to have a CEL. Features a 2 piece design. IMPORTANT NOTE: This